We are pleased to invite you to attend the IEEE International Dynamic Spectrum Access Symposium (DySPAN 2011) held in Aachen, Germany, 3 – 6 May 2011. Sponsored by the IEEE Communications Society, IEEE DySPAN has grown to be a premier conference on all communications aspects that are relevant not only for Dynamic Spectrum Access and Cognitive Radios but covering also other radical and novel approaches and technologies towards more efficient spectrum use.

The conference includes six tutorials covering both technology and policy related issues. The technical program on 4 – 6 May is organized as a single-track conference until lunchtime, and then switches to parallel tracks. The plenary sessions include excellent top-level keynote speakers, three high-level interdisciplinary panels, and joint technology-policy paper sessions. During the afternoons 12 different technical and policy sessions, some of them mixed, should provide food for thought for all participants. IEEE DySPAN 2011 also includes special sessions for technical demonstrations and posters.